Renesas M3A-HS19 用户手册

Features and Specifications 

2.7 I/O Port 

Rev.1.01  Oct 28, .2008 

2-16

REJ10J1351-0101 

 

 

 

2 

2.7 I/O Port 

 

Following I/O ports on the M3A-HS19 can be configured by the SH7619 MCU. These ports are multiplexed pins with up to 

four features. Some pins have several initial features for normal mode and HIF (Host Interface) boot mode. Features can 

be controlled by PFC (pin function controller). 

• PA16 - PA25 
• PB00 - PB13 
• PC00 - PC20 
• PD0 - PD7 
• PE00 - PE24 

The M3A-HS19 is connected with a memory, expansion connectors, a PCMCIA connector, a LAN connector, an RS-232C 

connector, an RS-422 connector and other control ICs. Some I/O ports are connected to DIP switches and LEDs, which 

can be used in the port mode as intended use. LED shows status in the PHY mode. 

Table 2.7.1 lists Mode DIP Switch (SW4) Features. The state will be loaded when the board is reset and started. 

 

Table 2.7.1 Mode DIP Switch (SW4) Features 

SW4-No. 

Description 

1 

ON: 

Big-endian 

  OFF: 

Little-endian 

2 

ON: Host interface (HIF) is NOT operating OFF: Host interface (HIF) is operating 

3 

ON: Normal boot mode 

 

OFF: HIF boot mode 

4 

ON: Flash ROM is write-protected OFF: 

Write-enabled 

 

Figure 2.7.1 shows the block diagram of I/O port connections to switches and LEDs.   

Table 2.7.2 and Table 2.7.3 list I/O port features. 

 

 

 

Figure 2.7.1 I/O Port Connection to Switches and LEDs